Proof is a measure of the alcohol content of a beverage. In the U.S., policymakers define proof as twice the percentage of alcohol by volume (ABV). For example, a drink with 40% ABV is 80 proof.

The liquor industry is obsessed with the strength of a whiskey when it’s bottled: 80 proof, 100 proof, cask strength. But there’s another measure of alcohol potency that’s just as important—if not ...

When shopping for spirits, you might see two different values on labels: "ABV," or alcohol by volume, and "proof." That second one isn't always there, as distilleries in the United States aren't ...

The amount of alcohol in a distilled spirit — for instance, vodka or whiskey — is known as the ”proof.” Different countries have different standards for an alcoholic beverage’s proof. In the United ...